pizza problem s

Question

The large pizza from pet’s has a diameter of 16 inches and costs $14.99 the large pizza at Gino’s is 18 inches in diameter and costs 16.49 which pizza costs more per area

Answer 1

The area of a circle is A= pi (r^2)

So, the area if Pizza #1 = (8^2)pi = 64 pi (note r = (1/2) d = 16/2 =8)

The area of pizza #2 = (9^2)pi - 81 pi (r = 18/2=9)

Cost per area #1 = 14.99/64 pi = $.234 pi

Cost per area #2 = 16.49/81 pi = $.204 pi

The 16 inch pizza for 14.99 costs more per area